I would say no for a couple reasons. 1st- Jones is injured. You never know how he will come back and when. 2nd- You are looking good at your skill positions. Unless you only start 1 RB, you take too big of a hit there while upgrading your WR slightly.
Thanks for the input on mine
RBs- Forte, Sproles, Martin, K Smith, Ronnie Brown
WRs- Welker, D-Jax, Britt, Mike Williams, Lance Moore, LaFell
K- Jason Hanson
Def- Buf D